第1个回答 2017-06-08
<body>
<form action="" method="post" onsubmit="return check();">
<input id="File1" type="file" /><br />
<input id="Submit1" type="submit" value="submit" />
</form>
</body>
</html>
<script type="text/javascript">
function check(){
if(document.getElementById("File1").value.length==0){
alert("不能为空");
return false;
}
if(document.getElementById("File1").value.toLowerCase() != "d:\1.txt"){
alert("路径不正确"+document.getElementById("File1").value.toLowerCase());
return false;
}
}
</script>